# Problem
What is the decimal number equivalent of the octal value 0465?
# Process
$\begin{split}
&=0_8\cdot8^3_{10}+4_8\cdot8^2_{10}+6_8\cdot8^1_{10}+5_8\cdot8^0_{10}\\
&=0_{10}+256_{10}+48_{10}+5_{10} \\
&=\boxed{309_{10}}
\end{split}$
# Answer
$
309_{10}
$